Rolling mill cooling device



March 22, Q HUNT I ROLLING MILL COOLING DEVICE 2 Sheets-Sheet Filed Nov. 26, 1929 Pateilted Mar. 22, 1932- UNITED STATES PATENT OFFICE NATHAN O. HUNT, OF SALEM, OHIO' ROLLING MILL coouue nnvrcn Application filed November 26, 1929. Serial No. 409,834.

The invention relates to rolling mills, and

more particularly to the control of roll tem-- cooled by externally applying a cooling mesv dium to the rolls, and the roll necks as by spraying water or blowing cold air thereon.

This method ofr'oll cooling does not evenly.

cool the same and the material being rolled by the rolls consequently does not have uniform characteristics.

It has been found that rolls 'may be very evenly and uniformly cooled-by introducing a cooling medium into the interior of the rolls, but difliculties have been encountered in providing a way for connecting a cooling medium supply line with each roll for introducing acooling medium such as water, oil or air into the interior of the roll, because the roll is a rotating body and the means for introducing the cooling medium therein must for all practical purposes be stationary.

Devices have been made in the past in an attempt to overcome these difliculties, but they have been unsuccessful because they have included a positive support for the device separate and apart from the connection of the device with the roll.

One of the objects of the present invention is therefore to provide for cooling rotating rolling mill rolls by introducing a cooling medium into the interior of the roll from a source of cooling medium supply.

A further'object of the invention is to provide a self contained construction which may be connected with or disconnected from a roll as a unit, and which has no support excepting its connection with the roll.

A further object of the invention is to provide a construction on which any lordinary repairs may be quickly and easily made when the rolls are idle, and a construction which may be readilyand quickly repaired in a very short space of time should a break-down occur during the operation of the rolls;

And final1y,an object of the invention is to provide a construction which may be readily and easily installed in connection with present types of rolls, and a construction having a simple design, and a slight initial cost. V

Theabove and other objects may be attained by providing a cooling device hereinafter described in detail, which may be generally stated as including a hollow roll, a

flanged coupling member secured in an end portion of the roll, a stationary casing having supply and discharge passages therein,

and means for connecting the coupling member and the casing together, a combined inj ector and dischar e tube being carried by the casing and extendlng into the hollow interior of the roll. 8 i

A preferred embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a side elevation of a rolling mill showing the improved'cooling device applied thereto; and

Fig. 2 is an enlarged sectional view through the cooling device applied to a roll, taken substantially on the line 22, Fig. 1.

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawings. i

The housing of a conventional rolling mill is shown at 10, inwhich is journaled up er and lower rolls 11 and 12, each roll belng provided at opposite ends with necks 13 which are mounted in customary brasses 14 and 14', and the rolls are provided with the usual wabblers 15 at their ends. The upper brass 14 is mounted in the movable head 16 which may be vertically adjusted in the housat 19, threaded at 20 and countersunk at 21.

The cooling device generally indicated at 22 may be coupled with the roll 11 or 12 by connecting a flanged threaded tubular coupling member 23 within an end portion of the roll bore. The coupling member 23 may be provided with a conically tapered portion 24 for engaging the roll'countersunk portion 21 when the threads 25 of the coupling member are engagedwith the threads 20 of the roll. The inner end 26 of the coupling member 23 is received within the counterbore 19 of the roll and theinterior tubular portion 27 of the coupling member 23 may be counterbored at 28 for receiving an Arguto wood bearing 29 for a purpose to be hereinafter set forth. The outer end of the coupling member 23 is preferably counterbored at 30 and provided with flanges 31 and 31a.

The cooling device 22 preferably includes a hollow casing 32, which has an enlarged cylindric portion 33 preferably threaded at 34. The coupling member 23 and the casing 32 are connected together in a manner permitting-relativerota'ry movement by a sleeve 35 provided with an internal flange 36, and threaded at 37. The enlarged cylindric portion 33 may be counterbored at 38 to have a diameter equal to the diameter of the counterbore 30 in the coupling member 23.

In connecting the coupling niember and casing together, a split ring flanged floating Arguto wood bearing 39 is interposed be tween the flanges 36, 31 and 31a, and another floating Arguto wood bearing 40 is interposed between the flange 31 and the enlarged cylindric portion 33. The threads 37 of the sleeve 35 are then screwed onto the threads 34 of the'casing so as to draw the several parts tightly together, the sleeve is then backed off a fraction of a turn and the set screw 40a is tightened up to permanently secure the sleeve 35 to the casing 32.

The casing has a threaded passage 41 for engaging a cooling medium supply or inlet hose coupling adapted 42, and has a threaded passage 43 for engaging the cooling medium outlet hose coupling adapter 44. The adapter 42 is preferably axially aligned with the casing 32, and the internal bore 18 of the roll 11. cooling medium injector tube or duct 45 is preferabl connected by threads 46 with the interior 0 the casing 32 in axial align ment with the adapter 42 and the injector tube is locked in place by the jam nut 46a which abuts against the inner end 47 of an outlet tube or duct 48, the outer end of which is seated as at 49 against a counterbore 50 provided in the casing 32 adjacent the threads 46. For positively securing the parts together, a lock nut 46a may be provided for the jam nut 46a. Substantially midway between its ends, the outlet tube 48 is journaled within the Arguto bearing 29 which provides a support for the tube, the outlet tube in turn supporting the injector tube 45 because of the jam nut connectiontherewith.

Openings 51 are formed adjacent the inner end 47 of the outlet tube for providing a communication between the interior of the roll bore 18 and the passageway 52 formed between the interior of the outlet tube 48 and exterior of the injector tube 45. Adjacent its outer end 49, the outlet tube 48 has openings 53 similarly formed therein,providing a communication between the-passageway 52 and an annular channel 54 formed within the interior of the casing 32 The annular channel 54 communicates as at 55 with the outlet coupling adapter 44.

An expansible rubber sleeve 56 is inserted within the aligned counterbores 30 and 38 when thecasing 32 and coupling 23 are being connected together, for sealing the joint therebetween. The rubber sleeve 56 is provided with a plurality of perforations 57 aligned with annular channels 57a for a purpose which will be hereinafter described.

The casing 32 is likewise provided-with a plurality of ears 58 for a purpose which will also be hereinafter described.

Referring to Figurel, hoses 59 and 60 may be coupled as at 42a to each inlet adapter 42 of each cooling device provided on each of the rolls 11 and 12 and these hoses may be connected at their other ends to a common source ofcooling medium supply by piping 61.

Similarly, hoses 62 and 63 may be connected with the outlet adapter 44 of the respective cooling devices. which hoses 62 and 63 communicate with a common discharge line by piping 64.

The cooling devices 22 may be connected together to prevent relative non-rotative movement by loosely passing a rod 65 through the aligned openings 66 in the ears 58 projecting from the respective cooling devices.

The operation of the device is as follows: A cooling medium, which is preferably cold water when the device disclosed in the draw ings is utilized, is forced under pressure through the supply piping 61, the hose con nections 59 and 60, through the adapters 42, and through each injector tube 45 in the direction shown by the arrows in Fig. 2. The water upon being dispelled from the inner end 45 of the injector tube, which inner end is preferably located adjacent the plugged end of the roll, passes backward through the bore 18 in the roll for absorbing heat from the roll. The flowing water then passes through the openings 51 in the outlet tube 48, along the passage 52, through the openings 53, along the annular channel 54, out the respective out- 'bearings 39 and 40 may rotate wit for lubrication will reachthe rubber sleeve 56, openings 576 may be provided in the out 31, or between the bearing 39 and the flange The rubber sleeve 56 may remain stationary with respect to the casing 32, or may rotate with the roll. In any event there are rubbing surfaces either between the sleeve 56 and the counterbore 38 or between the sleeve 56 and the counterbore 30. Because of the water pressure against the interior of the rubber sleeve 56, the joint between the casing 32 and the coupling member 23, Where the bearing 40 is interposed, is sealed against water leakage.

The casings 32 are maintained stationary during rotation of the rolls by the rod 65 which passes loosely through the holes 66 in each ear 58. Hit is at any time necessary to repair the cooling device, the couplings 42a and 44a may be disconnected-from the coupling adapters 42 and 44, the set screw 40a may be unloosened, and the sleeve 35 unscrewed, at which time the casing and permanently connected injector tube'may be withdrawn as a unit from the roll and repaired; and if the roll is to be repaired, the coupling member 23 may be disconnected therefrom by applying a wrench to the flange 31aof the coupling member.

It is pointed out that the only support for the cooling device is the sleeve 35 which connects the casing 32 with the coupling member 23. Thus the device is free to Wabble and weave with the roll but is prevented from rotating with the roll because of the rod 65.

I claim:

1. A device for cooling internally bored rolling mill rolls including, a casing provided with cooling medium inlet and outlet passages, a flanged tubular coupling member adapted for connection with the roll bore, means connecting the coupling flange and casing permitting relative rotary movement between the same, floating bearings between the coupling member flange, the casing and the connecting means, and cooling medium inlet and outlet ducts carried by the casing extending through the cou ling and adapted for insertion within the r0 1 bore. a

2. A device for cooling internally bored rolling mill rolls including, a casing provided withcooling medium inlet and outlet passages, a flanged tubular coupling member adapted for connectionwith the roll bore, means connecting thecoupling flange and casing permitting relative rotary movement between the same, floating bearings between the coupling member flange, the casing and the connecting means, means for sealing the connection between the coupling and the casing, and cooling medium inlet and outlet ducts carried by the casing extending through the coupling and adapted for insertion within the roll bore. v

3. A device for cooling internally bored rolling mill rolls, including a casing provided with cooling medium inlet and outlet passages, a tubular coupling member adapted for connection with the roll-bore, means con-' necting the coupling and casing permitting relative rotary movementbetween the same, means for sealing the connection between the coupling and casing, and coolin medium inlet and outlet ducts carried b t e casing extending through the coupling and adapted forinsertion within the roll bore.

4. A device for cooling internally bored rolling mill rolls, including a casing provided with cooling medium inlet and outlet passages, a tubular coupling member adapted for connection with the roll bore, means connecting the coupling and casing permitting relative rotary movement between the same, an expansive .sleeve for sealing the connection between the coupling and casing, and cooling medium inlet and outlet ducts carried by the casing extending through the coupling and adapted for insertion within the roll bore.

5. A device for cooling internally bored rolling mill rolls including, a casing provided with cooling medium inlet and outlet passages, a tubular coupling member adapted for connection with the roll bore, means connecting the coupling and the casing permitting relative rotary movement between the same,

a bearing carried by the coupling member, a

cooling medium outlet tube communicating with the casing outlet passage carried by the casing journaled in the bearing and adapted for insertion within the roll bore, a cooling injector tube within the roll bore.

6. A device for cooling internally bored rolling mill rolls including, a casing provided with cooling medium inlet and outlet passages, a tubular coupling member adapt- .ed for connection with the roll bore, means connecting the coupling and casing permitting relative rotary movement between the same, means for sealing the connection between the coupling and casing, a bearing carried by the coupling member, a cooling medium outlet tube communicating with the casling adapted for insertion within the roll ing outlet passage carried by the casing jourbore.

naled in the bearing and adapted for insertion within the roll bore, a cooling medium injector tube communicating with the cas-' ing inlet passage carried by the casing located within the outlet tube and adapted for-insertion within the roll bore, and means connecting the outlet tube and injector tube together for forming a support for the injector tube within the roll bore.

7 In combination with a rotatable rolling mill roll having an internal bore, a casing provided with cooling medium inlet and outlet passages, means for maintaining the easing stationary ,when the roll is rotated, a coupling connected with the roll bore and rotatable with the roll, means supporting and journaling the casing on the coupling permitting relative rotary movement between the casing and coupling, and cooling medium inlet and outlet members stationarily mounted on the casing and journaled in thecoupling forming communications between the casing and roll bore.

8. In combination with a rotatable rolling mill roll having an internal bore, a casing provided with cooling medium inlet and outlet passages, means for maintaining the casing stationary when the roll is rotated, a coupling connected with the roll bore and rotatable with the roll, means supporting and journaling the casing on the coupling permitting relative rotary movement between the casing and coupling, means for sealing the connection between the casing and coupling, and cooling medium inlet and outlet members stationaril mounted on the casing and journaled in t e coupling forming communications between the casing and roll bore. I 9. In combination with a plurality of ro- In testimony that I claim the above, I have hereunto subscribed my name. NATHAN C. HUNT.

tatable rolling mill rolls having internal bores, a casing provided with coolin medium inlet and outlet passages for each roll, a coupling connected with each roll bore, means supporting and journaling each casing on its respective coupling permitting relative rotary movement between respective casings and couplings, cooling medium inlet and outlet communications between the respective casings and roll bores, and means connecting the casings together maintaining the same stationary when the rolls are rotated.

10. A device for cooling internally bored rotatable rolling mill rolls including a casing provided with cooling medium inlet and out let passages, means for maintaining the casing stationary, a rotatable tubular couplin A member. adapted for connection with the rol bore, means supporting and journaling the casing on the coupling permitting relative rotary movement between the casing and coupling, and cooling medium inlet and outlet ducts stationarily mounted on the casing and journaled in and extending through the coup- 

